Support structure for a cooking grill



FIG. 1 is a depiction of a perspective view of the support structure for a cooking grill.

FIG. 2 is a depiction of a top view thereof.

FIG. 3 is a depiction of a front view thereof.

FIG. 4 is a depiction of a back view thereof.

FIG. 5 is a depiction of a side view thereof; and,

FIG. 6 is a depiction of a bottom view thereof.

The details shown in broken lines form no part of the claimed design. 

I claim the ornamental design for a support structure for a cooking grill, as shown and described. 